Floor and ceiling structure



Feb. 18, 1930. M. s. GOLDSMITH 1,747,295

FLOOR AND CEILING STRUCTURE Filed Jan. 12. 1927 flax 5. Golds/17H]? Patented Feb. 18, 1930 UNITED STATES .ATE

MAX S. GOLDSMITH, OF CINCINNATI, OHIO, ASSTGNOR TO THE GOLDSMITH METAL LATE COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO FLOOR AND CEILING STRUCTURE Application filed January 12, '1927. Serial No. 160,739.

element which serves first as a supporting means for receiving a poured concrete floor and which becomes invisibly keyed to the concrete floor when the concrete sets.

Another object is to provide a lire-proof ceiling element which is light in weight and easy to handle and assemble.

Another object is to provide an element of this kind which may be used to produce a continuous metal ceiling and which may be embossed for providing an ornamented ceiling when desired.

These and other objects are attained by the means described herein and disclosed in the accompanying drawings, in which Fig. 1 shows a perspective view, partly in cross section, of a floor and ceiling structure embodying a device of the invention.

Fig. 2 is a perspective view of a ceiling element of the invention, part being broken away.

Fig. 3 is a. tragmental top plan view of a series of ceiling elements in position for re ceiving a concrete floor.

The device of the present invention comprises a hollow sheet metal member having a rectangular bottom or base 5 and side and end walls 6 and 7 extending at right angles thereto. The side and end walls 6 and 7 do not extend to the corners 8 of the base, but terminate at a distance therefrom. The top wall 9 is cut off at the four corners to provide top edges 10 which overhang triangular corner portions 11 of the base 5. The terminations of the side and end walls 6 and 7 extend at an acute angle from the base 5 to the corners 12 formed at the junction of the top edges 10 with the edges 13 and i l of the top wall 9. Pieces 15 extend from the top of base 5 to the edges 10 and join the ends 16 and 17 of side and end walls 6 and 7. The

hollow interior of the elements are filled with fire-proofing material 180 which may be in loose dry form or in any other form. As will be noted in Fig. 2 the ceiling element of the invention takes the form of a hollow filled slab which presents a perfect rectangle on its bottom face and which has cut away and under cut corners slightly overhanging the corners of the base.

In constructing a floor and ceiling, the ceiling elements may be laid upon spaced suitably supported stringers with the corners 8 of four adjacent elements meeting at common points and with the sides 6 and 7 in abutment with one another. At this time the faces 15 will have their opposite ends 16 and 17 in abut-, ment so as to provide hollow truncated pyramidal openings or pockets at the unction of each four adjacent ceiling elements. The bottom of this hollow space or recess is closed by the four abutting triangular portions 11 so that the lower faces of bases 5 present a continuous closed ceiling while the top "faces 9 form a solid surface having spaced dovetailed openings therein.

lVorkmen may wall: about upon the top faces 9 and position sheet metal domes 18 and reinforcing bars preparatory to the pouring of concrete for forming a concrete floor 19 and concrete beams 20. Any suitable means may be provided for positioning the domes or tiles 18. Vfhen the concrete is poured, that portion which flows between adjacent tiles 18 forms the beams 20 and also runs into the openings or pockets formed by the abutting ceiling elements. When the concrete has set, the concrete which fills the clovetailed openings forms a series of integral concrete keys 21 which look the ceiling elements to the beams. The stringers or supporting elements, (not shown) may then be removed whereupon a complete fire-proof metal ceiling is provided. Such ceilings r quire no plaster finish. but may be immediately painted or decorated.

This structure is advantageous because it eliminates the necessity of using a solid false floor structure and the labor and material necessary therefor. A further advantage lies in the fact that the keys which look the ceiling elements to the beams are invisible when the structure is complete.

hat is claimed is 1. In a concrete floor construction the combination of a series of metal ceiling elements having rectangular bottom faces, the edges of which abut one another for forming a continuous ceiling surface, the top portions of said elements being undercut for a distance at the corners whereby a plurality of such elements may provide dovetailed pockets and a unitary concrete slab covering the elements and entering the ways after forming a concrete floor with depending concrete keys for locking the elements to the concrete floor.

2. In a concrete floor construction the combination of a series of filled metal ceiling elements having continuous bottom faces abutting one another along all edges for providing a continuous surface, said elements being undercut for a distance at the upper corners to provide tapered pockets above abutting corners of adjacent elements and a unitary concrete slab extending over the top faces of the elements and into the said tapered ways for forming a concrete floor and integral keys for locking the elements to said floor.

3. As a new article of manufacture a hollow ber, 1926.

MAX S. GOLDSMITH.

metal ceiling element having a filler of fire proof material, said element having a rectangular bottom face and undercut corners tapered downwardly for a distance from the top face of said element.

4. As a new building structure a series of hollow metal ceiling elements filled with fireprooiing material and having undercut top corner portions whereby a plurality of abutting elements may form a continuous surface having tapered pockets extending partly therethrough, said surface being adapted to support a poured concrete floor and to receive said concrete in the ways to form invisible keys for locking the elements to the floor and upon one another.

5. In a building structure the combination of a plurality of metal ceiling elements having fire-proof material contained interiorly thereof and adapted to provide an unbroken surface for receiving a poured plastic floor and having pockets in the top thereof for receiving said plastic whereby the elements are invisibly keyed to the plastic floor and a poured plastic slab covering and invisibly supporting the elements as stated.

6. As a new article of manufacture a hollow sheet metal ceiling element having a fire-proof material contained therein, a rectangular bottom face for said element and an octagonal top face, certain of the sides being undercut for a distance toward the rectangular face. 

